Thoroughly clean the cylinder block and check its technical condition. To check the cylinder diameters accurately measure the cylinder diameters. Measurements to be made with a caliper in three belts as in the transverse direction «A», and in the longitudinal direction «B», as shown in the diagram (pic. 2-7).
If the diameter of the cylinders differs by more than 0.04 mm from the allowable values indicated in Table 2-1. the block must be replaced if the cylinders are not bored and repair sizes are not installed in a portion.
Check the cleanliness of the lubrication channels. Check the flatness of the mating surface of the block with the cylinder head.
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